#include <iostream>
#include <unistd.h>
#include <sys/types.h>
#include <signal.h>

using std::cin;
using std::cout;
using std::endl;



int main()
{
    
    while (1)
    {
        cout << "我是一个进程：" << getpid() << endl;
        sleep(1);
    }
    return 0;
}